Numbers k such that x-4, x-2, x+2, x+4 are primes, where x = 30*k - 15.

Terms

a(0) =1a(1) =4a(2) =7a(3) =28a(4) =50a(5) =63a(6) =70a(7) =109a(8) =116a(9) =189a(10) =315a(11) =434a(12) =522a(13) =525a(14) =536a(15) =602a(16) =631a(17) =648a(18) =701a(19) =743a(20) =844a(21) =1058a(22) =1162a(23) =1460a(24) =1712a(25) =1845a(26) =2100a(27) =2241a(28) =2317a(29) =2408